Primera · first 14 days — live forecast · rest of month — climate corridor
🗺️ 14-day forecast map
Primera & neighbors — hit play
Every city on the map carries real forecast data from the same models as its city page, refreshed several times a day. The icon is the day's overall look; the number is the afternoon high.
Next 14 days at a glance
from the model forecast
Hottest day
41°
Thu, Sep 10
Coldest night
26°
Tue, Sep 1
Days with precip
0 / 14
of 14 forecast days
Nicest day
Mon, Sep 7
mild, dry, light wind
The next 4 weekends
plan ahead
Sat 5 – Sun 6 Sep
39° 27°
17% precip chance
Sat 12 – Sun 13 Sep
40° 26°
9% precip chance
Sat 19 – Sun 20 Sep
35° 23°
typical range
Sat 26 – Sun 27 Sep
36° 24°
typical range
30 days — Primera
14 forecast + 16 climatology
Mon · Today Sunny
39°26°5%⌄
Wind20 mph SE
Gusts31 mph
UV index11 – Very high
Precip chance5%
Sunrise07:10
Sunset19:52
Tue · Tomorrow Sunny
39°26°3%⌄
Wind21 mph SE
Gusts29 mph
UV index11 – Very high
Precip chance3%
Sunrise07:11
Sunset19:51
Wednesday 2/9 Sunny
39°27°3%⌄
Wind22 mph SE
Gusts33 mph
UV index11 – Very high
Precip chance3%
Sunrise07:11
Sunset19:49
Thursday 3/9 Sunny
39°27°5%⌄
Wind22 mph SE
Gusts31 mph
UV index11 – Very high
Precip chance5%
Sunrise07:11
Sunset19:48
Friday 4/9 Sunny
39°27°6%⌄
Wind19 mph SE
Gusts30 mph
UV index9 – Very high
Precip chance6%
Sunrise07:12
Sunset19:47
Saturday 5/9 Sunny
39°27°3%⌄
Wind19 mph SE
Gusts29 mph
UV index9 – Very high
Precip chance3%
Sunrise07:12
Sunset19:46
Sunday 6/9 Sunny
37°27°17%⌄
Wind23 mph E
Gusts34 mph
UV index9 – Very high
Precip chance17%
Sunrise07:13
Sunset19:45
Monday 7/9 Sunny
37°26°4%⌄
Wind22 mph E
Gusts33 mph
UV index9 – Very high
Precip chance4%
Sunrise07:13
Sunset19:44
Tuesday 8/9 Sunny
39°26°3%⌄
Wind17 mph SE
Gusts29 mph
UV index9 – Very high
Precip chance3%
Sunrise07:13
Sunset19:43
Wednesday 9/9 Sunny
40°27°2%⌄
Wind17 mph S
Gusts26 mph
UV index9 – Very high
Precip chance2%
Sunrise07:14
Sunset19:42
Thursday 10/9 Sunny
41°27°2%⌄
Wind19 mph SE
Gusts31 mph
UV index10 – Very high
Precip chance2%
Sunrise07:14
Sunset19:41
Friday 11/9 Sunny
39°27°7%⌄
Wind15 mph S
Gusts30 mph
UV index8 – Very high
Precip chance7%
Sunrise07:15
Sunset19:40
Saturday 12/9 Sunny
40°26°3%⌄
Wind19 mph SE
Gusts30 mph
UV index10 – Very high
Precip chance3%
Sunrise07:15
Sunset19:39
Sunday 13/9 Mostly cloudy
37°26°9%⌄
Wind23 mph SE
Gusts30 mph
UV index8 – Very high
Precip chance9%
Sunrise07:15
Sunset19:37
Monday 14/9 Light rain (climatological)
38°26°1.4 mm⌄
Day≈35–41°
Night≈23–29°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 15/9 Partly cloudy (climatological)
38°26°20%⌄
Day≈35–41°
Night≈23–29°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 16/9 Partly cloudy (climatological)
39°26°20%⌄
Day≈36–42°
Night≈23–29°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 17/9 Light rain (climatological)
38°26°1.8 mm⌄
Day≈35–41°
Night≈23–29°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 18/9 Partly cloudy (climatological)
36°25°20%⌄
Day≈33–39°
Night≈22–28°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 19/9 Partly cloudy (climatological)
34°23°20%⌄
Day≈31–37°
Night≈20–26°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 20/9 Light rain (climatological)
35°24°1.4 mm⌄
Day≈32–38°
Night≈21–27°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 21/9 Partly cloudy (climatological)
36°25°20%⌄
Day≈33–39°
Night≈22–28°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 22/9 Partly cloudy (climatological)
40°27°20%⌄
Day≈37–43°
Night≈24–30°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Wednesday 23/9 Light rain (climatological)
41°28°1.6 mm⌄
Day≈38–44°
Night≈25–31°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Thursday 24/9 Partly cloudy (climatological)
39°27°20%⌄
Day≈36–42°
Night≈24–30°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Friday 25/9 Partly cloudy (climatological)
36°25°20%⌄
Day≈33–39°
Night≈22–28°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Saturday 26/9 Light rain (climatological)
36°25°1.3 mm⌄
Day≈33–39°
Night≈22–28°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Sunday 27/9 Partly cloudy (climatological)
34°24°20%⌄
Day≈31–37°
Night≈21–27°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Monday 28/9 Partly cloudy (climatological)
36°25°20%⌄
Day≈33–39°
Night≈22–28°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
Tuesday 29/9 Light rain (climatological)
40°27°1.5 mm⌄
Day≈37–43°
Night≈24–30°
Precip≈0.6 in / September
(climatological)Typical range for these dates · 1991–2020
How does a 30-day outlook work?
The first 14 days are a live model forecast. The back half of the month shows the typical range for those dates — useful for planning, not a literal prediction.
First 14 days: a real forecast, blended from NBM, ECMWF and GFS runs. Trust it most inside three days; by the second week treat it as a lean, not a promise.
Rest of the month: past day 14 we stop pretending to forecast and switch to the climate corridor — the range those dates have produced over three decades computed directly for Primera, with mild week-to-week wiggle.
Good question for this page: "Is late August usually humid in Chicago?" Bad question: "Do I need an umbrella on the 29th?" — three weeks out no one knows, and that's the honest answer.